Pump construction



Dec. 14, 1948.

D. B. STRICKLIN PUMP CONSTRUCTION 2 Sheets-$h eet 1 Filed June 25, 1946 jm/er for' v Dara/[m6 Dec. 14, 1948.

D. B. STRICKLIN I I 2,456,339

PUMP CONSTRUCTION Filed June 25, 1946 2 Sheets-Sheet 2 Patented Dec. 14, 1948 1i 1 UNITED STATES PATENT OFFICE PUMP CONSTRUCTION Darwin B. Stricklin, Milwaukee, Wis.

Application June 25, 1946, Serial No. 679,158 1 Claim. (01. 103-41) This invention relates to improvements in liquid pumps, having for an object to provide a durable and constructionally simplejthough highly efficient, pump especiallyadvantageous tor use in pumping various liquids, as for example, oils and similar matters, to hydraulic motors, hydraulic rams and various otherhydrauli'cally operated apparatuses and devices for their operation.

It is also an object of the invention to provide a pump of the indicated character, which is of compact and small size and is capable of quantity production at .a minimum of cost.

Moreover, the inventionaims to provide aliquid pump whose body or casing is of one-piece construction and has bores or other openings formed therein in a highly novel and advantageous manner and relationship, adapted to function as plunger and valve receivingchambers or cylinders and as fluid conducting ingress and egress ways. :In the present time production of liquid pumps of the types herein'concerned, it is a recognized and well-established fact that piston or plunger cylinders, valve cylinders, and other and necessary parts of a pump casing, are required :to be honed or lapped to very :close tolerances. .In pump constructions wherein this type of precision work must be done, considerable and costly labor is entailed in the accurate and efficient rattainment and/or holding of such tolerances, especially, where blind or non-through bores or openings in pump casings are encountered, with the result that production costs-430th of labor and piece lossare materially increased.

By means of my invention, and particularly, the novel formation and arrangement of bores in the pump casing, the above stated difiiculties are eliminated, specifically, 'due to the reduction to minimum of blind or non-throu-ghbores. In consequence, in producing said pumps, an =Verall efficiency is attained with a minimum'of labor, material and time outlay.

The foregoing, as well as other objects, advantages and meritorious teachings of my invention, will be in part obvious and in part pointed out in the following detailed disclosure thereof, when taken in conjunction with the accompanying drawings, it being understood that the form of the "invention presented herein is precise and what is now considered to be the best mode of embodying its principles, but that modifications and changes may be made in specific embodiments without departing :f-rom its essential features. 1

In the drawings:

Figure l is a top plan view f my improved pump, showingfit installed.

Figure 12 is a vertical longitudinal section through a liquid tankor' reservoir which receives and supports my improved "pump thereimthe latter being shown in side elevation.

Figure 3 is a detail in transverse section taken on the line 3-3 of Figure 2, looking in the direction in which the arrows point.

:Figure 4 is a vertical longitudinal section through the improved pump and the liquid tank receiving and supporting it therein.

Figure 5' is a vertical transverse section taken on the line 5-5 of Figure 2, looking in the direction in which the arrows point, and

Figure 6 is a fragmentary detail in vertical transverse section, taken on the line 6-45 of Figure 2, looking in the direction in which the arrows point. I

Referring in detail to the accompanying drawings, .I have therein shown my pump operatively associated with a liquid supply tank or reservoir T, whose normally upper end is partially closed by a plate :P engagedover .its marginal portions. Fluid or liquid-tight connection is efiected between the engaged portions of the tank and the plate by the interpositioning of a suitable acking 1? and then passing screws 8 through adjacent portions of said plate into threaded engagement with the appropriate aligned pockets or openings in the tank sides. Note that the plate P has a medially located rectangularly shaped opening 0 formed in the same, the .purpose of which will be presently apparent.

The improved pump comprises a cast or otherwise .formed generally rectangular body block I, of metal or other suitable material, having a laterally extending flange 2' integral with and arranged entirely about its normally upper end, and an internally threaded nipple extension 3 on the lower enlarged rounded end 4 of one of its sides. A portionof one side of the body is dished, as at 5, to facilitate its engagement into the rectangular opening 0 in the plate P, wherebythe same will be dependingly supported from said plate in the manner shown .in Figures 2, 4 and 5 of the drawings. 1

To firmly or solidly support the body vI in depending relationship from the plate P and to efiect fluidtightness between the pump body flange 2 and adjacent portions of the plate P, a packing, gasket or other suitable device or is interposed between adjacent and relatively overlapped parts of the flange and the plate (see Figure 4). Thereupon, bolts, screws or other connecting devices b are engaged through appropriate portions of the flange 2 with corresponding portions of the plate P, to the required extent.

The body 1 is formed with vertical and relatively parallel bores'fifil and 8. The bores '5 and 8 extend entirely throughthe body, opening onto the upper .and;lower sides of the same, while the bore (I opens onto the upper-side of said body and its lower end terminates therewithin in communication with a reduced vertically alignedway or duct 'lopening onto a horizontally .and some what enlarged way 9 in the body, hereinafter more fully described, as is well shown in Figure 4 of the drawings.

Counter-bores 6' and 8 are made in the upper end portions of the bores 6 and 8, respectively, and communicate with downwardly directed drain holes I and II discharging outwardly of the body I beneath the flange 2, thus providing for trapping of amounts of by-passed pumped liquid in such counter-bores and its return, by drainage, through said holes to the liquid tank or reservoir T. In this manner, a material manufacturing economy is efiected, due to the elimination of the need or use of packings and packing nuts at the upper ends of said bores 6 or 8.

The horizontal way 9, above referred to, is preferably circular in cross section. It opens onto the nipple extension 3, intersects and communicates with the lowerend of the bore 6 intermediately thereof, and extends inwardly of the body I to a point below the bore I and'communicates with the lower end of the reduced duct I. The inner end of said way is in spaced relation to the bore 8.

To effect liquid return to the supply tank T i from the bore I, a horizontal duct or way I2 is formed in the body I. The inner'end. thereof opens into a lower portion of said bore and its outer end, onto one side of the body, while an intermediate portion intersects and communicates with the adjacent and intermediate portion of the bore 8 (see Figure 4).

As shown in Figures 4 and of the accompanying drawings, the lowerend of the bore 6,

i. e., that portionthrough the enlarged end 3,

has a greater diameter than the body of said bore and is, preferably, formed with an internal annular shoulder. A suction actuatable and spring returned stem valve seating and retaining member I3, of generally circular shape, is positioned adjacent the described open enlarged end 4 of the body I. The normally inner side of the same is annularly shouldered, as at I4, and so sized as to be snugly engaged and received in and by the aforesaid internal annularshouldered portion of the open enlarged end 4. Fluidtight connection between themember I3 and the adjacent portion of the lower side of the enlarged end 4 of the body I, is effected by arranging suitable packing I5 between adjacent portions thereof, thereupon passing connecting screws I6 through appropriately arranged and formed openings in the member I3 into screw threaded engagement with adjacent portions of the body'I The member I3 is formed or otherwise provided with a chambered valve seat I! and has ingress ways or ducts I8 formed therein communicating with said chamber and opening outwardly of the member. A valve I9 is engaged on the chambered valve seat I! and has its stem I9 slidably received through an adjacent sleeved portion of the member I 3. An expansible coiled spring 20, having one end engaged with an ad iace'nt portion of the member I3, and its opposite end about and with-an appropriate portion of the outer end of the valve stem I9, as at 2 I serves to normally retain the suction actuated stem valve in seated engagement with the member I3.

The outer end of the horizontal way 9 is closed by a screw-threaded plug 22 turned. into en gagement with the internally threadednipple extension 3. Thus, access may be had to the former, as and when required.

Slidably received within the bore 6 is a cylindrically shaped pump plunger 23 carrying suitable packing 24 on its lower end; its upper end being formed, as at 25, for pivotal connection with the free end of an eccentric operated pitman 25, the eccentric 21 of which is connected to a suitable m'otor or other power supply means, not shown.

The upper end of the bore I has one part of a coupling or union 2B engaged therein (see Figure 4), while a discharge conduit 29, or like means, is connected to its opposite end and thus, provides for the conduction of pump fluid from the bore I to its point of ultimate use.

Seated in the lower and remaining end of the bore I, normally closing the duct I, is a spherical valve 3!), whose disposition or arrangement is such that it will control communication between the way 9, the duct I, and the horizontal duct I2; Said spherical valve 30 is normally retained in its seated or closed position through the medium of an expansible coiled spring 3i arranged in and longitudinally of the bore I, one end of which bears on a suitable fitting 32 engaging the valve 39, while its opposite end has fixed bearing with the adjacent inner end portion of the coupling 28.

: At this point, it is to be understood that the tension of the expansible coiled spring I is such that when oil or other liquid is pumped through the duct I, the pressure imparted thereto will be entirely sufficient to unseat the spherical valve 30; hence, permitting its outfiowing from the bore I through the discharge conduit 29 or, if desired, through the horizontal duct I2 for bypassing back into the supply tank T.

In order that by-passing of oil or liquid from the bore I through the horizontal duct I2 into the supply tank T may be electively controlled, a cylindrical valve 33 is slidably received in the bore 8. The upper or outer end of said valve is formed or otherwise prepared, as indicated at 34, to permit the connection of suitable operating mechanism 34' thereto .for imparting sliding movement to the same. Thus, with inward positioning of the cylindrical valve 33, it will be seen that the lower portion thereof will be engaged across or over the intermediate portion of the horizontal'duct I2, and in consequence, flow of oil or liquid from the bore 1 through said duct into the tank T, will be prevented. However, should the cylindrical valve 33 be moved upwardly in its bore 8 to a point above or beyond the horizontal duct I2, passage of oil or liquid will be then permitted through the latter from the bore I and by-passed into the supply tank T. By the same token, the rate of by-passing or flow of oil or liquid through said horizontal duct I2 from the bore 1 into the supply tank T, may be effectually modulated by appropriately varying the positioning of the lower end portion of the valve 33 with relation to the horizontal duct I2, thereby increasing or diminishing the size of the'orifice or way.

Toinstall or attach my improved pump to a tank such as herein indicated by the reference letter T, the body I of the pump is endwise inserted through the opening in the plate P. To effect such insertion, the body I is arranged in an oblique or canted postion with relation to the opening. in said plate P and is then moved, endwise, downwardly through the opening therein. As it is moved downwardly into the tank T, the dished portion 5 on one side of the body permits it to be moved to a position at substantially right angles to the plate P, allowing the flange '2 to flushly engage with or contact the packing or gasket 9. Thereupon, the connecting devices .1

are engaged and the pump 6 secured in an immovable relation to the tank T and its plate P. Connections are effected between the pump plunger 23 and its eccentric driving means and the cylindrical valve 33 and its operating means 34. Fluid is supplied to the proper level in the tank T.

Upon reciprocation of the pump plunger 23, and particularly, during the upstroke thereof, oil or other liquid will be drawn from the supply tank T through the ingress ducts l8 of the valve seating and retaining member I3 into the chambered valve seat ll. With upward or unseating movement of the spring retained stem valve I 9, under urge of suction applied thereto from the plunger 23, said liquid will be drawn by the valve and upwardly into the pump cylinder or bore 6. Upon downward stroke of the pump plunger 23, and assuming that the cylinder valve 33 has been moved to its closed position, as shown in Figure 4 of the drawings, the liquid will be forced downwardly from the bore 6 through the horizontal way 9, thence upwardly through the duct I by the pressure unseated spring retained spherical valve 30 into the bore 1 from whence it will discharge from the bore via the discharge conduit or connection 29 to its point of usage.

Should it be desired to by-pass the liquid from the discharge conduit 29, the cylinder valve 33 slidably operating in the bore 8, is moved to uncover or partially uncover, or open, the horizontal by-passing duct I2. With the cylinder valve 33 thus adjusted or positioned, liquid discharged under pressure from the way 9 by means of the pump plunger 23, will move upwardly through the reduced duct 1', unseating the spring retained spherical valve 30, whereupon it will flow through the horizontal by-passing duct I2 back into the tank T. As heretofore explained, the rate of discharge or by-passing of liquid from the bore 1 into the tank T may be regulated to the desired nicety or degree by adequate vertical adjustment of the cylindrical valve 33 with relation to said by-passing duct I2.

Such liquid as may by-pass the plunger 23 and/or the cylindrical valve 33 and reach the upper portion of their respective bores 6 and 8, will betrapped in the counter-bores 6' and 8, from which it will drain through their respective openings l0 and H back into the tank T.

Inspection, repair or removal of parts of my improved pump may be readily effected. Such inspection, repair or replacement may be efiected (l) by removing the valve seating and retaining member I 3 from the lower end of the pump body I; (2) by removing the screw closure plug 22 from the nipple extension 3 of the body I, thus revealing the interior of the passage Way 9; (3)

pulling the pump plunger 23 and/or the cylindrical valve 33 from their respective bores 6 and 8, or (4), in the case of the active parts housed in the bore I, by removing the coupling 28, thus giving access to the same and said parts.

As hereinbefore set forth, a pump constructed in accordance with the teachings of my invention is capable of mass production at a minimum of cost and with a maximum of'manufacturing economies, particularly, because of the manner or method of forming the bores 6, 1 and 8 in the pump body block I. Precision work necessary to be done in connection with the bores 6, 1 and 8 can be effected with but a minimum of labor and time expenditure, and proper tolerances can be attained and held. Moreover, the number oi boring operations necessary for the forming of the bores 3, 1 and 8, the ways 9 and I2, and the duct 1', whereby to effect the hereinbefore described intercommunication or interrelationing therebetween, is maintained at strictly minimum, plus avoiding the necessity of making blind or nonthrough bores or holes in the pump body block I.

It will be readily understood by skilled artisans tha my improved pump is capable of many usages; also, that the size of such pump and/or its assembly or any one or more of the parts thereof, may be increased or decreased, such as conditions or preference may dictate.

I claim:

A body block for pumps, consisting of a single piece of material, a flange integral with the upper side of the block extending horizontally and outwardly therefrom entirely thereabout and having its under surface flat throughout the entire area thereof, said body having a plurality of spaced and parallel vertically disposed straight bores therein opening onto its upper side inwardly of said flange, certain of said bores terminating, in the block in spaced relation to its lower side, and the remaining bore extending entirely through the block and opening onto its lower side, a portion of said block intermediately of its upper and lower sides having a straight horizontal bore therein openingonto one vertical side thereof and its inner end terminated within the block, said horizontal bore communicating with the lower ends of said certain bores, means normally closing the outer end of said straight horizontal bore, an intermediate and lower side portion of the horizontal bore opening onto said lower side of the body, another portion of the body having a second straight horizontal bore therein communicating with one of said certain bores and said remaining bore intermediately of the opposite ends of the latter bore and opening onto the opposite vertical side of the block, the upper ends of all said bores being enlarged adjacent and at their respective points of opening onto the upper side of the block, and said block having downwardly directed drain openings in portions of the same communicating with the enlarged upper ends of said certain and remainin bores and opening onto said vertical sides of the block below the under side of said flange, a reciprocal plunger received in one of said certain bores and extending from its upper end, check valve means in the other of said certain bores adjacent its point of communication with the first mentioned horizontal bore, and a cylindrical valve reciprocally received in said remaining bore engageable over and across said second horizontal bore at its points of communication with said remaining bore.

DARWIN B. STRICKLIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

